He was torn between being amused and feeling sympathy towards Kaoru as he watched the older man go through so many stages of shock and anxiety. If he were more like Toshiya, he would make some sort of joke about Kaoru's age, how his heart couldn't handle all this stress, but per usual, he remained quiet as Kaoru moved past him.
Behind him, past the bathroom door, and out into the open of the apartment, he could just barely hear Kaoru's voice. He assumed the older man was explaining to him why he was here in the first place, and Shinya wondered if it would upset Ebizo that he was here. Another pet name was heard, and any doubts he had about Kaoru and Ebizo being a pair were completely wiped away.
Looking down at the kitten in his hands, then at the one who seemed to be finished trying to hack up that hairball Shinya was unaware of the awkwardness that was soon to come.
The door opened wide, and Shinya turned to face Ebizo, stopping when he saw that grin. No amount of time with two adorable kittens could prepare him to feel comfortable with all the enthusiasm that flooded the bathroom and made him feel like suffocating, and with an awkward bow of his head, he mumbled a greeting in return before carefully setting a squirming kitten down on the floor.